/[public]/psiconv/trunk/lib/psiconv/parse_image.c
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Annotation of /psiconv/trunk/lib/psiconv/parse_image.c

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Revision 11 - (hide annotations)
Mon Oct 11 15:17:17 1999 UTC (24 years, 5 months ago) by frodo
File MIME type: text/plain
File size: 6558 byte(s)
(Frodo) Now image stuff compiles.

Only psiconv_parse_paint_data_section is defined at this moment, it is not
yet called.

1 frodo 10 /*
2     parse_image.c - Part of psiconv, a PSION 5 file formats converter
3     Copyright (c) 1999 Frodo Looijaard <frodol@dds.nl>
4    
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9    
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13     GNU General Public License for more details.
14    
15     You should have received a copy of the GNU General Public License
16     along with this program; if not, write to the Free Software
17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18     */
19    
20     #include "config.h"
21     #include <stdlib.h>
22    
23     #include "data.h"
24     #include "parse_routines.h"
25    
26     int psiconv_parse_paint_data_section(const psiconv_buffer buf,int lev,
27     psiconv_u32 off, int *length,
28     psiconv_paint_data_section *result)
29     {
30     int res = 0;
31     int len = 0;
32 frodo 11 psiconv_u32 size,offset,picsize,temp,datasize,pixelnr,datanr;
33     psiconv_u8 marker;
34     int i;
35 frodo 10
36     psiconv_progress(lev+1,off,"Going to read a paint data section");
37     (*result) = malloc(sizeof(**result));
38    
39     psiconv_progress(lev+2,off+len,"Going to read section size");
40     size = psiconv_read_u32(buf,lev+2,off+len);
41     psiconv_debug(lev+2,off+len,"Section size: %08x",size);
42     len += 4;
43    
44     psiconv_progress(lev+2,off+len,"Going to read pixel data offset");
45     offset = psiconv_read_u32(buf,lev+2,off+len);
46     if (size != 0x28) {
47     psiconv_warn(lev+2,off+len,
48     "Paint data section data offset has unexpected value");
49     psiconv_debug(lev+2,off+len,
50     "Data offset: read %08x, expected %08x",offset,0x28);
51     }
52     len += 4;
53    
54     psiconv_progress(lev+2,off+len,"Going to read picture X size");
55     (*result)->xsize = psiconv_read_u32(buf,lev+2,off+len);
56     psiconv_debug(lev+2,off+len,"Picture X size: %08x:",(*result)->xsize);
57     len += 4;
58    
59     psiconv_progress(lev+2,off+len,"Going to read picture Y size");
60     (*result)->ysize = psiconv_read_u32(buf,lev+2,off+len);
61     psiconv_debug(lev+2,off+len,"Picture Y size: %08x:",(*result)->ysize);
62     len += 4;
63    
64     picsize = (*result)->ysize * (*result)->xsize;
65    
66 frodo 11 psiconv_progress(lev+2,off+len,"Going to read 6 unused longs");
67 frodo 10 for (i = 0 ; i < 6; i++) {
68     temp = psiconv_read_u32(buf,lev+2,off+len);
69     if (temp != 0x00) {
70     psiconv_warn(lev+2,off+len,
71     "Paint data section prologue has unknown values");
72     psiconv_debug(lev+2,off+len,
73     "offset %02x: read %08x, expected %08x",i,temp,0x00);
74     }
75     len += 4;
76     }
77    
78     (*result)->red = malloc(sizeof(float) * picsize);
79     (*result)->green = malloc(sizeof(float) * picsize);
80     (*result)->blue = malloc(sizeof(float) * picsize);
81     len = offset;
82     datasize = size - len;
83    
84 frodo 11 psiconv_progress(lev+2,off+len,"Going to read the pixel data");
85 frodo 10 pixelnr = 0;
86     datanr = 0;
87     while ((datanr < datasize) && (pixelnr < picsize)) {
88     marker = psiconv_read_u8(buf,lev+3,off+len+datanr);
89     psiconv_debug(lev+3,off+len+datanr,
90     "Pixelnr %08x, Datanr %08x: Read marker %02x",
91     pixelnr,datanr,marker);
92     datanr ++;
93     if (marker >= 0x80) {
94     /* 0x100 - marker bytes of data follow */
95     if ((0x100 - marker + datanr > datasize) ||
96     ((0x100 - marker) * 4 + pixelnr > picsize)) {
97     psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
98     psiconv_debug(lev+3,off+len+datanr,
99     "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
100     "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
101     datanr,marker);
102     } else {
103     for (i = 0; i < 0x100-marker; i++) {
104     temp = psiconv_read_u8(buf,lev+3,off+len+datanr+i);
105     (*result)->red[pixelnr + i*4] =
106     (*result)->green[pixelnr + i*4] =
107     (*result)->blue[pixelnr + i*4] =
108     (temp & 0x03) * (1.0/3.0);
109     (*result)->red[pixelnr + i*4 + 1] =
110     (*result)->green[pixelnr + i*4 +1] =
111     (*result)->blue[pixelnr + i*4 + 1] =
112     ((temp >> 2) & 0x03) * (1.0/3.0);
113     (*result)->red[pixelnr + i*4 + 2] =
114     (*result)->green[pixelnr + i*4 +2] =
115     (*result)->blue[pixelnr + i*4 + 2] =
116     ((temp >> 4) & 0x03) * (1.0/3.0);
117     (*result)->red[pixelnr + i*4 + 3] =
118     (*result)->green[pixelnr + i*4 +3] =
119     (*result)->blue[pixelnr + i*4 + 3] =
120     ((temp >> 6) & 0x03) * (1.0/3.0);
121     }
122     }
123     pixelnr += (0x100 - marker) * 4;
124     datanr += (0x100 - marker);
125     } else { /* marker < 0x080 */
126     if ((datanr + 1 > datasize) ||
127     (marker * 4 + pixelnr > picsize)) {
128     psiconv_warn(lev+3,off+len+datanr,"Corrupted picture data");
129     psiconv_debug(lev+3,off+len+datanr,
130     "Picsize: %08x, Datasize: %08x, Pixelnr: %08x,"
131     "Datanr: %08x, marker: %02x",picsize,datasize,pixelnr,
132     datanr,marker);
133     } else {
134     temp = psiconv_read_u8(buf,lev+3,off+len+datanr);
135     for (i = 0; i < marker; i++) {
136     (*result)->red[pixelnr + i*4] =
137     (*result)->green[pixelnr + i*4] =
138     (*result)->blue[pixelnr + i*4] =
139     (temp & 0x03) * (1.0/3.0);
140     (*result)->red[pixelnr + i*4 + 1] =
141     (*result)->green[pixelnr + i*4 +1] =
142     (*result)->blue[pixelnr + i*4 + 1] =
143     ((temp >> 2) & 0x03) * (1.0/3.0);
144     (*result)->red[pixelnr + i*4 + 2] =
145     (*result)->green[pixelnr + i*4 +2] =
146     (*result)->blue[pixelnr + i*4 + 2] =
147     ((temp >> 4) & 0x03) * (1.0/3.0);
148     (*result)->red[pixelnr + i*4 + 3] =
149     (*result)->green[pixelnr + i*4 +3] =
150     (*result)->blue[pixelnr + i*4 + 3] =
151     ((temp >> 6) & 0x03) * (1.0/3.0);
152     }
153     }
154     pixelnr += marker * 4;
155     datanr += 1;
156     }
157     }
158     len += datanr;
159    
160     if (length)
161     *length = len;
162    
163     psiconv_progress(lev+1,off+len-1,"End of paint data section "
164     "(total length: %08x", len);
165    
166     return res;
167     }
168    
169    

frodo@frodo.looijaard.name
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